为什莫SVG我的利用<text>标签写入中文会报错呢，而英文没有问题呢

<svg xmlns="http://www.w3.org/2000/svg" >
  <defs>
        <pattern id="p1" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse" patternContentUnits="objectBoundingBox">
            <path stroke="#F0F0F0" fill="none" d="M0,0H20V20"></path>
        </pattern>
  </defs>
  <rect width="1200" height="1000" fill="url(#p1)"></rect>
  <text>慕课网</text>
</svg>